OPTIMIZING DESIGN OF MECHANICAL SELF-CENTERING DEVICE FOR SUSPENSION HEIGHT

Firstly,in view of the respective defects of existing self-centering devices for vehicle suspension height,the design scheme of the proposed mechanical self-centering device for suspension height is described.Taking the rear suspension of a certain light bus as a research example,the structures and parameters of the novel device are designed and ascertained.Then,the road excitation models,the performance evaluation indexes and the half-vehicle model are built,the simulation outputs of time and frequency domain are obtained with the road excitations of random and pulse by using MATLAB/Simulink sofiware.So the main characteristics of the self-centering suspension are presented preliminarily.Finally,a multi-objective parameter design optimization model for the self-centering device is built by weighted sum approach,and optimal solution is obtained by adopting complex approach.The relevant choosing-type parameters for self-centering device components are deduced by using discrete variable optimal method,and the optimal results are verified and analyzed. So the performance potentials of the self-centering device are exerted fully in condition of ensuring overall suspension performances.